Removal of malachite green from dye wastewater using neem sawdust by adsorption

Adsorption of Methylene Blue from Aqueous Solution Using Steam-Activated Carbon Produced from <i>Lantana camara</i> Stem

“…As expected, at constant initial concentration of dye, increasing the sample dose provides a greater surface area and larger number of adsorption sites and hence enhancement of dye uptake [30]. The primary factor explaining this characteristic is that adsorption sites remain unsaturated during the adsorption reaction whereas the number of sites available for adsorption site increases by increasing the adsorbent dose [31].…”

Phenol Removal from Aqueous Solution by Adsorption Process: Study of The Nanoparticles Performance Prepared from Alo vera and Mesquite (Prosopis) Leaves

“…The size of particle provides valuable information on achieving optimum usage of adsorbent and adsorption capacity [34].Particle size of 95 nm was applied in the adsorption kinetic experiment of this study to remove phenol. The smaller the adsorbent particles the faster the diffusion because more tiny pores are exposed to adsorbate molecules.…”

“…Such an increase in removal efficiency is due to more empty sites available for phenol adsorption at shorter contact times where the phenol contact increases with empty sites. The empty sites were occupied by the phenol in solution until 60 min passes and the removal efficiency reached its maximum capacity [34,41]. In their study, Mohanty et al's (2005) used activated carbon produced from sawdust tree in tropical regions and found that the phenol adsorption and phenol removal efficiency increased from 36% to 63% by increasing contact time from 20 to 180 min [42].…”

Effect of Activation Time on the Pinang Frond based Activated Carbon for Remazol Brilliant Blue R Removal

“…In the time interval of 5-20 hours, the RBBR removal slowly increases and reaches saturation above 20 hours. This condition is due to the fact that a large number of surface sites are available for adsorption at the initial stages, and after the passage of time, the remaining surface sites are difficult to occupy because of the repulsion between the solute molecules of the solid and bulk phases [25]. At the end (24 hours), between 40.8% and 87.6% of the RBBR has been successfully removed at all initial dye concentrations, where the latter is achieved using an initial dye concentration of 50 mg/L.…”